The effect of metal additives, including Zr, Mg, and Ga, on the conventional Cu/ZnO/Al₂O₃ (CZA) catalyst, was investigated for methanol synthesis using an oil-cooled annulus reactor. The annulus reactor was found to reduce the temperature gradient within the diluted catalyst bed by effective cooling and thus provide experimental data at steady-state and in kinetic regime allowing for the comparison of intrinsic activity between different catalysts. The addition of Zr enhanced the overall performance of methanol synthesis. However, the CZA-Zr catalyst displayed significantly reduced CO₂ conversion, possibly due to intensified water-gas shift reaction activity. The addition of Ga and Mg to CZA was found to be detrimental to the catalytic performance and is attributed to difficulties in reducibility and the increased crystalline size of copper particles. A relatively long induction period was observed for CZA-Zr sample in this study, which is attributed to the effective cooling imparted by the annulus reactor suppressing the r-WGS reaction.

使用油冷环空反应器研究了金属添加剂（包括Zr，Mg和Ga）对常规Cu / ZnO / Al ₂ O ₃（CZA）催化剂的影响。发现环空反应器通过有效冷却降低了稀释的催化剂床层内的温度梯度，从而提供了稳态和动力学状态下的实验数据，从而可以比较不同催化剂之间的固有活性。Zr的添加增强了甲醇合成的整体性能。但是，CZA-Zr催化剂显示出显着降低的CO ₂转化，可能是由于水煤气变换反应活性增强所致。发现将Ga和Mg添加到CZA中不利于催化性能，并且归因于难于还原性和铜颗粒的晶体尺寸增加。在本研究中观察到CZA-Zr样品的诱导期相对较长，这归因于环空反应器抑制r-WGS反应的有效冷却。